Stamping machine



M. ARNOLD STAMPING MACHINE Filed Feb. 12, 1930 4 Sheets-Sheet 1 WITNESSES Aug. 11, 1931.

M. ARNOLD STAMPING MACHINE I Filed Feb.

4 Sheets-Sheet 3 ATTORN EY M. ARNOLD STAMPING MACHINE Filed Feb. 12. 1930 Aug. '11, 1931.

4 Sheets-Sheet 4 4/ III lllllllllll! INVENTOR ATTORN EY M w w M WITNESSES Zad: it)

Patented Aug. 11, 1931 uNiTEn STATES MAX ARNOLD, or NEW YORK, N. Y.

STAMPING MACHINE Application filed February 12, 1936. SerialNo. 427,869.

This invention relates to stamping machines.

It is among the objects of the present invention to provide a novel and improved stamping machineparticularly adapted for the rapid stamping of signs and similar stencils.

It is a further object of the present invention to provide a stamping machine including a pantographic structure for guiding the stamp punch, whereby it may be readily controlled to duplicate anydesired pattern. A further object of the present invention is to provide a novel and improved stamping machine which includes novel structural features, whereby the device is adapted to act at an unusually high rate of speed.

A further object of the present invention.

is to include in a stamping machine improved means for controlling the penetration of material by the stamping punch in such manner as to insure a full thrust of the stamping punch at all times. 'For this purpose the machine is designed to be 5 stopped only when the punch is in fully raised position. 1 Another object of the present invention is to provide in a stamping punch, an improved material-supporting and moving structure designed to prevent sticking or jamming of the material carriage.

Other objects of the present invention are to provide an apparatus of the character described which is of simple construction and includes various structural features whereby reduction offriction and increased speed of operation are obtained.

The machine is particularly efficient in operation and is particularly, designed to meet the demands ofeconomic manufacture and economic design reproduction.

Other objects and features of, the present invention will be apparent from a considerar tion of the following specification taken in conjunction with the accompanying drawings, in which Figure 1 is a side elevation of one form of the present invention;

Fig. 2 is a detail view of the supporting 5 table, being taken on theline 22 of Fig. 1;

Fig. 3 is a detail sectional View of the carriage mounting, being taken on the line 33'of Fig. 2;

Fig. 4 is a front elevation, partly in section, of the punchmechanism showing the 5 I punch in lower inoperative position Fig. 5 is a. similar view showing the punch in raised inoperative position;

v Fig. 6 is a similar view showing the punch in raised operative position;

Fig. 7 is a similar view showing the punch in lowered operative position;

Fig. 8 is a sectional view taken on the line 8-8 of Fig. 4;

Fig. 9 is a detail view illustrating the use of the present device in the formation of embossed signs wherein the punch indents the sign plate as distinct from passing therethroughas in the case illustrated in Figs. 4 to 7 inclusive.

Referring more particularly to Fig. 1 of the drawings, the form of the invention -herein shown by way of illustration, in-

cludes a general frame or body 10, supported in suitable manner as by legs 11. Mounted on legs 12 is astamping table 13,

which is positioned on the frame 10. Slidably mounted upon the table 13, a workholder assembly is mounted. The work holder includes a work-engaging sleeve 14 having a spaced bar 15, to which the plate to be punched may be secured by suitable lugs 16. The sleeve 14 is mounted upon a transverse bar 17, one end of which has a right-angularly extending'sleeve 18 slidably mounted upon a guide bar 19, while the opposite end has a roller 20 movable upon a track 21 of the table 13. As illustrated in the detail view in Fig. '3, there is associated with the bar 17 an auxiliary guiding arm 22, the ends of which are provided with rotatably mounted gears 23, which are adapted to mesh with racks 24 and to move thereover, the arrangement being such that the tooth connection between the arm 22 and the'racks 24, provides for the proper transverse position of the bar 17 as it moves forwardly and rearwardly on the table 13. It will be seen that without the racks and means, the bar 17 might be moved angular- 1y with respect to its transverse position, whereby the sleeve 18 would bind upon the rod 19 and prevent the easily guided movement of the bar 17 and also the movement 1 of the plate or work which is to be punched,

than the machine is broad and this can be done by shifting the sign in the holder in one direction while the sample is shifted in the opposite direction.

For guiding the work under the punch, which will be hereinafter described, a copying device in the form of a pantograph assembl is provided. This assembly includes forwardly extending arms 26, which adjustably carry a forward work holder 27 and a transverse stylus carrying bar 28, within which a stylus 29 is mounted. The sign or design to be copied is mounted on the table, and by sliding movement of the arm 17 in conjunction with transverse sliding of L" the sleeve 14 thereon, the stylus ma follow the design in the Work to be copier, which is indicated at 30, whereby the work 25 is moved in accordance with the movements of the stylus to move the work under the punch.

The punch structure includes a substantial body 31, associated with a suitable source of power, such as a motor 32.

Mounted upon the body 31, is a longitudinally extending power shaft 33, preferably including a weighted balance wheel 34. As indicated by the belt 35, any suitable means may be provided for delivering power from the motor 32 to rotate the shaft 33. In the form of the invention here shown, the speeds of rotation of the motor shaft and the shaft 33, are preferably substantially the same, and as will be herein seen, the structural arrangement is such that the machine may be operated at unusually high speed whereby reduction in the speed of rotation from the motor to the shaft is not required.

The shaft 33 is mounted in suitable vertically-extending bearings 37 rising from the forward portion of the body 31, its forward projecting end including an extending crank 38, formed by an eccentric pinion extending from the forward end of the shaft, the arrangement being such that vertical reciprocation of the appended drive link 39 is provided. The link 39 is adjustably associated by theelongated apertures and screws inclicated at 40, witha main link 41, the lower end of which is coupled for respective rotary movement within the upper bifurcated portions of a driving head 42. As shown in the sectional. view of Fig. 8, the head 42 has beveled side edges 43 which are received in grooved guide bars 44. The guide bars are vertically positioned on the front end of the body 31, whereby the head 42 is arranged for guided vertical movement at the front end of the body 31. From the foregoing it will be seen that the structural arrangement is simple and that the mounting is such that the head 42 is free to reciprocate at high speed within the guide bars 44.

Associated with the front of the head 42, a punch case, including side members 45, is provided. Within the punch case, a punch head 46 is mounted for slight reciprocation. The lower end of the head 46 carries a punch 47, which extends slightly therebelow. The table 13 is apertured directly under the punch and is provided with a die 48 supported within a die holder 49. The punch head 46 includes a vertical stem 50, which is threaded at its upper extremity, and which passes through the cross bar of the punch housing. surrounding the stem 50 and a nut 53 is mounted on the extremity of the stem to control the tension applied to the punch through the spring 51.

For controlling the extension of the punch below the punch housing, the upper end of the head is provided with a ratchet face 54, and within the housing a rotatable sleeve 55 having an extending operating handle 56 is mounted. The lower face of the sleeve 55 is provided with a corresponding ratchet face, the arrangement being such that when the sleeve 55 is rotated for interrelation of the ratchet faces, as shown in Figs. 4 and 5, the punch head is in upward position under the influence of the spring 51, and thus reciprocation of the head 42 will not act to bring the punch in contact with the work supported thereunder. Upon movement of the sleeve 55, however, the ratchet surfaces cam each other apart, whereby the punch head 46 is moved further below the head 42, and reciprocations of the head 42 thus move the punch into punching contact with the work 25,. this position of the parts being shown in Figs. 6 and 7 An important feature of the present in vention is the means for controlling the operat'ive movement of the punch head 46 and the associated punch. In devices of the character of the present invention now in use, various means are employed whereby no control of the motor is used to control the reciprocation of the punch, and in some instances foot-controlled means are provided for moving the control out of contact with the work. In the present invention, movement of the work may be made without stopping the motor or the reciprocations of the punch head. By shifting the sleeve 55, it will be seen that the punch head moves upwardly whereby its reciprocations do not bring it in contact with the work, and thus the high speed of operation may be continued and the punch thrown out of opera- A spring 51 is provided .tionwithout stopping its normal reciprocation.

For rotating the sleeve to control the operating movement of the punch head by foot control, a transverse control bar 57 is provided, which, as indicated in Fig. 8, is

positioned across the face of'the guides 44.

One extending end of the bar 57 is provided with an encircling spring 58 in Figs. 4 and 5. For moving the control 16 bar 57 in the opposite direction, a crank 60 pivotally mounted on the extension of the .body 31, is provided. One end is associated .with a flexible cable 61, which passes over a pulley 62, asshown in Fig. 1, .to be controlled by a footlever 63. The opposite end of the crank 60, as shown in Fig. 8, is bifurcated,

as at 64, to receive a pin of the bar '57, the arrangement being such. that rocking movement of the crank 60 will movethe bar 65 against the tension ofthe spring 58 to move the sleeve 55 to the position shown in Figs. 6 and 7, whereby reciprocation of the punch head will cause the punch to pene- Hate the work 25. As shown in Figs. 4 and 5, the bar 57 has a dependingbifurcated plate 66, which receives within the furca tions thereof, the handle 56, thus to provide rotation of the sleeve 55 upon reciprocation of thebar 57.

To prevent rotary movement of the sleeve 55 to throw the head 36 into'operative position when the head 42 is in its downward position, which operation would immediately throw the punch 47'intocontact with the work whereby damage of'the workand punch might result, the head 42vis provided with a pin 67 movable therewith and adjustably positioned within a housing 68.

The upper face of the'bar 57 is provided with a plate 69, while one of the bearings 70 of, the bar 57 is provided with a pivotally movable latch 71 normally urged down toward the bar 57 by a spring 72. When the head 42 is in'downward position, the pin 67 is out of contact with the latch 71. Thus the latch 71 lies upon the upper surface of the bar 57 and movement of the bar to the operative position shown in Figs. 6 and 7 is prevented by engagement of the latch 71 with the plate 69, this position of the latch and plate being shown in Fig. 4. In such position, pressure on the foot. lever 63 will not cause movement of the cable 61. When, however, the latch 42 is in the upper position, as shown in Fig. 5,'the pin 67 raises the latch 71 and pressure on the lever 63 will permit the bar 57 to move under the influence of the cable 61, to move the sleeve 55 to cam the head 46 downwardly'to the o erative positiona's shown in .Figs6and7. 1 p In the operation of thisform of the device, it will-beseen that the work orblank 25 from which a sign or stencil is to be cut,

is secured by the lugs 16 to the work-holding bars 15 and 27. The design or sign to be copied, as indicated at 30, is positioned on the table 13 and the stylus 29 is moved over the sign, whereby the blank is moved under the punch47, which punctures a line in the blank in accordance with the. line followed by the stylus. During the punching operation of the machine, the foot pedal .63 is retained in downward position, whereby the handle 56is kept in the position indicated in Figs. 6 and- 7, holding thehead 46 in downward position. vWhen the work is to be moved without punching to providespaces between the letters and spaces in the letter lines, as for stencils as indicated in Fig. 2, pressure is removed from the foot lever 63 and the spring 58 moves the bar 57 to rotate the sleeve 55 to the inoperative position of the-punch head, as indicated in Figs. 4 and 5. When the punching is to be discontinued, pressure is again exerted on the foot lever 63, but by the action of the latch 71, return rotation of the sleeve 55is prevented until such time as the head 42 is in completely raised position, at which time the sleeve maybe rotated to again move the head to the operative position shown in Figs. 6 and 7. 1 y

1 In connection with the present invention, it will be understood that the device is not confined to the definite specific structure herein shown, but it will be understood that the machine may be arranged for work other than complete punching of the work.

Referring to Fig. 9, it will be seen that a recessed die 75 may be substituted for the apertured die 48 and the punch 47 may be substituted by a shorter punch 76. In such an arrangement the plate is embossed and struck out. without puncture therethrough. The operation of the form of the invention as indicated in Fig. 9, is substantially the same asjin' the punching operation. hereinbefore described. From the foregoing it will readily be seen that the device provides a simple, eflicient, high speed punching machine, which may be readily controlled by foot operation and which is designed to reproduce signs or designs in the minimum time. It will be understood that the invention is not confined to specific structural details, but that numerous changes, modifications, and the full use of equivalents may be resorted to without departing fromthe spirit or scope of the present invention as outlined in the appended claims,

What isclaimed is:

1. In a device of the character described,

a reciprocating head, a punch head slidably mounted thereon, rotatable means for controlling the position of said punch head "withrespect to said reciprocating head, and

a flexible cable-controlled means for rotating said rotatable means to move said nch head with respect to said reciprocating head.

2. In a device of the character described, a reciprocating "head, a punch head slidably mounted thereon, rotatable means for controlling the position of'said punch head with respect to said reciprocating head, a flexible cable-controlled means for rotating said rotatable means to move said punch head with respect to said reciprocating head, and means for preventing movement of said rotatable means when said reciprocating head is in its downward position.

3. In a device of the character described, a. reciprocatinghead, a punch head slidably mounted thereon, rotatable means for controlling the position of said punch head withrespect to said reciprocating head, a flexible cable-controlled means for rotating said rotatable means to move said punch head with respect to "said reciprocating head, and means for preventing movement of said rotatable means when said reciprocating head is in its downward position, said second mentioned means including a transversely movable bar engagable with said rotatable means. I

4. In a device of the character described, a reciprocating head, a punch head slidably mounted thereon, rotatable means for controlling the position of said punch head with respect to said reciprocating head, a flexible cable-controlled means for rotating said rotatable means to move said punch head with respect to said reciprocating head, means for preventing movement of said rotatable means when said reciprocating head is in its downward position, said second-mentioned means including a transversely movable bar engage'able wth said rotatable means, and a crank operable "by a cable for reciprocating said bar. 7

5. In a device of the character described a reciprocating head, a punch head slidably mounted thereon, rotatable means for controlling the position of said punch head with respect to said reciprocating head, a flexible cable-controlled means for'rotating said rotatable means to move said punch head with respect to said reciprocating head, means, for preventing movement of said rotatablemeans when said reciprocating head is inits downward position,said secondmentioned means including a transversely movable bar engageable with said rotatable means, a crank operable for reciprocating Said bar, and a latch member engageable with said bar to restrict reciprocating movement thereof. I

6. In a device of the character described, a recriprocating head, a punch head slidably mounted thereon, controlling the position of said punch head with respect to said reciprocating head,na flexible cable-controlled means for rotating said rotatable means to move said punch head with respect to said reciprocatinghead, means for preventing movement of said rotatable means when said reciprocating head is in its downward position, said second-mentioned means including a trans- V-ersely rotatable means, a crank operable for reciprocating said bar, a latch member engageable with said bar to restrict reciprocating movement thereof, and a pin carried by said reciprocating head to move said latch member'to release said bar when said reciprocating head is in upward position.

7. In a machine of the class described, the combination of a punch, a movable work holder arranged in relation to said punch adapted to movably retain work under said punch, means "td operate said work holder to move the work under the punch in accord ance with a given design, and means to guide the work holder during its movement, said last means comprising a transverse rod with which the rear edge of said work holder is slidably connected, a fixed rod arranged at a right angle to the first rod, one end of said first rod being slidably connected with said fixed rod, a track, a roller on the other end of the first rod which rolls in contact with said track, fixed gear racks arranged at right angles to said first rod, a shaft carried by said first rod, and gears on said shaft which mesh with said racks.

Signed at 1356 Wilkins Avenue in the movable bar engageable with said rotatable means for:

county of Bronx and State of New York,

this 7th day of February, 1930.

MAX ARNOLD. 

